Apple’s 1,000-Participant Heart Rate Study: What Apple Stated, and the Four Things It Did Not

Apple says a study of more than 1,000 participants, run in July and August 2026, found Apple Watch to have the most accurate heart rate sensing in a wearable when compared with leading competitors. That sentence is the entire published basis for the claim. Apple Watch Series 12, the product the accuracy claim is attached to. Image: Apple There is...